Mixing head for machines for producing multicomponent plastics
AssigneeMaschinenfabrik Hennecke GmbH
InventorsFerdinand Althausen, Reiner Raffel
Life of this patent
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Abstract
The present invention provides a mixing head having vertical lift slides in which the injection pressures can be altered. Each lift slide is provided with a number of injection openings of different diameters arranged in one plane perpendicular to the axis of the slide. The injection pressure is altered by rotating the lift slide to bring a different injection opening into registry with a mixing chamber. The head of each lift slide is provided with a head having change-over detents which mesh with a carrying yoke to facilitate changing injection openings. The lift slides may also be provided with return openings of such diameter that the pressure in the system remains the same whether the slides are in a mixing position or a return position.
Claims7
A mixing head for a machine for producing multicomponent plastics, comprising a housing, and at least two hollow slides which are guided in bores in the housing, said slides being coupled together by a yoke and having inlet openings which communicate with feedlines and injection openings which, in the mixing position of the slides, open into a mixing chamber, wherein the lift slides have a plurality of injection openings differing in cross-sectional area from one another, arranged in a single plane perpendicular to the axis of the slides and wherein the slides are provided with heads which carry changeover detents engaging with the yoke the detents being so arranged that selected injection openings can be brought into communication with the mixing chamber.
A mixing head for a machine for producing multicomponent plastics comprising a housing and at least two hollow slides which are guided in bores in the housing, said slides being coupled together by a yoke and each slide having a number of injection openings of varying cross-section arranged in a first plane perpendicular to its axis and a number of inlet openings arranged in a second plane, parallel to and spaced from said first plane, each injection opening being so coupled with an inlet opening such that when the injection opening opens into a mixing chamber its coupled inlet opening communicates with a feedline, and each slide having a head which carrys detents which engage the yoke and which are so arranged that a selected injection opening can be brought into communication with the mixing chamber.
Dependencies are inferred from the claim text.